Unless you're having issues with the stitches slipping you may not need to try bamboo, but do get bigger needles either way.

I recommended bamboo needles not because they keep my stitches from slipping (although they can do that, too) but because they have helped me create uniform stitches.

And here's additional proof from ArtLady on another thread:

"My students (Friday night Knitting 101 class) all did better with Clover Takumi bamboo needles. One of the students had learned to knit a hundred years ago, but her tension and control of her stitches was always her bane, downfall...and led her to give up. (she had learned to knit way back then with 14" metal straight needles, btw)

This time 'round, she was using Clover bamboo needles because that was on my Class Materials list. I specifically recommended wood or bamboo.

Her tension and stitch control was PERFECTION, and I can't tell you how happy she was!"

So it's worth a try. Save your receipt, and if you don't like them or they don't help, simply return them!